5. Muriatic Acid
For severely stained toilets, muriatic acid can be a last resort. It’s a very strong chemical and must be used with caution. Ensure proper ventilation, wear gloves, and goggles for protection. Follow the manufacturer’s instructions closely when using this product.
6. Denture Tablets
For mild stains, drop a couple of denture cleaning tablets into the toilet bowl and leave them to dissolve for a few hours or overnight if necessary. Afterward, scrub the bowl with a toilet brush and flush.
7. Chlorine Bleach
Chlorine bleach is effective for not only whitening stains but also disinfecting the bowl. Pour a half-cup of bleach into the bowl and let it sit for about 30 minutes. Then brush the entire bowl and flush. Ensure proper ventilation and do not mix with other cleaners to avoid hazardous gases.
8. Hydrogen Peroxide
Hydrogen peroxide can act as a mild bleach. Pour half a cup into the bowl and let it sit for around 30 minutes. Give it a scrub with your toilet brush and then flush. This can help remove lighter stains and sanitize your toilet.
9. DIY Scrubbing Paste
Make a paste of equal parts baking soda and water, or for tougher stains, add some lemon juice or white vinegar to the paste. Apply the paste to the stain and leave it on for 10-15 minutes. Scrub with a brush and rinse by flushing.
10. Preventive Maintenance
Maintain regular cleaning, possibly incorporating a drop-in toilet bowl cleaner that reduces staining with each flush. Keep a toilet brush nearby for quick clean-ups, and consider installing a water softening system to combat hard water stains from the onset.

Engaging diligently with these methods will help keep your toilet sparkling clean and stain-free. Remember that sometimes multiple applications maybe necessary, and some trial and error to find the method that works best for your situation. With consistent effort, your bathroom can stay fresh and welcoming.